Sand-trap.



W. H. WHITE.

SAND TRAP.

APPLICATION FILED Nov, I5. I9l6.

L226AQ'A Patented May15,1917.

2 SHEETSSHEET l.

INVENTOR WITNESSES ZZ ATTORNEY W. H. WHITE.

SAND TRAP.

APPLICATION FILED Nov,1s.19|s.

Patented May 15, 1917.

2 SHEETS-SHEET2- INVENTOR ATTORNEY Burns in. lncmu'rna. wasmm; mu. 0. c4

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III I WITNESSES UNTTED %TATE% PATENT OFFTQE,

WILLIAM H. WHITE, 0F ROANOKE, VIRGINIA, A-SSIGNOR T0 "WHITE-AMERICAN LOCO- MOTIVE SANDER COMPANY, INC., OF BOANOKE, VIRGINIA, A CORPORATION OF VIRGINIA.

SAND-TRAP.

Application filed November 15, 1916.

fl '0 all whom it may concern:

Be it known that I, WVILLIAM H. WHITE, a citizen of the United States, residing at Roanoke, in the county of Roanoke and State of Virginia, have invented new and useful Improvements in Sand -Traps, of which the following is a specification.

This invention relates generally to improvements in sanding devices for locomotives of that general type shown in my prior Patents No. 1,086,964, dated Feb. 10, 19141, No. 1,117,119, dated Nov. 10, 191 1, No. 1,180,217, dated April 18, 1916, and No. 1,201,126, dated Oct. 10,1915.

In the construction shown in my prior Patent No. 1,180,217, and particularly in my aforesaid Patent No. 1,201,126, I have disclosed a sand trap having a sand channel comprising vertical and horizontal portions, respectively, connected with the sand supply and delivery pipe, a blast nozzle projecting into the channel. at the angle of inter section of its vertical and horizontal portions, and clean-out pipes disposed respectively within the vertical branch of the channel and sand supply pipe within the delivery pipe, whereby the blasts of air may be supplied to prevent choking of the supply and delivery pipes or any undue accumulation of sand therein.

In the construction shown in my aforesaid Patent No. 1,201,126, I have also disclosed air supplying connections for the feed of air to the clean-out pipes from a common source of supply, and which is designed to overcome certain objections to the construction disclosed in Patent 1,180,217, the form of connection disclosed in the said application comprising a duct formed in the body of the sand trap below the horizontal sand feed channel thereof and connecting with both of the clean-out pipes below the line of said channel.

The construction embodied in my aforesaid Patent No. 1,201,126, however, is open to one objection inasmuch as the arrangement of the blast duct and connections necessitates the extension of the vertical clean-out pipe in the supply connections downwardly into the horizontal. portion of the trap and at one side of the blast nozzle, by which interfering surfaces are caused to lie in the line of feed of the sand, whereby the sand is liable to accumulate at the angle of inter- Specification of Letters Patent.

Patented May 15, 1917.

Serial No. 131,576.

section of the vertical and horizontal portions of the sand blast channel, thus interfering with the free and unobstructed delivery of the sand.

The object of the present invention is to provide a construction and arrangement of the clean-out pipes, duct and connections whereby this objection is avoided, and which also permits of the air supplying connections to the cleanout elements to be more conveniently arranged.

A further object of the invention is to provide a construction whereby the cleanout air feed duct and clean-out pipes will be respectively formed and disposed entirely above the line of the feed channel, thus enabling the air supplying connections thereto to be placed at a point above the sand trap when convenient, and also enabling the upper wall of the blast channel to be made of increased thickness, if desired, to better sustain the wear and tear of the sand blast, and thus increase the durability of the trap.

The invention in the preferred form of details will be described in the following specification, reference being had to the accompanying drawing, in which Figure 1 is a fragmentary side elevation of a locomotive showing the application of the invention.

Fig. 2 is a side elevation of the sand trap detached.

Fig.8 is a vertical longitudinal section of the same.

Fig. 4 is a section on the line 1 1 of Fig. 3.

Fig. 5 is a section on the line 55 of Fig. 3.

The trap, as stated, is of the general construction disclosed in my aforesaid prior patents, and preferably comprises an L-shaped body 1 having an upright or inlet section 2 and. a lateral or horizontal section 3. The section 2 connects with the lower end of a sand supply pipe 4. leading from the sand box 5, while the section 3 connects with a delivery or sanding pipe 6 through which the sand is conducted to the track. The body 1 is interiorly and longitudinally cored to produce a sand channel 7 having horizontal and vertical branches, the vertical branch being directly connected with the sand supply pipe to receive the sa'nd therefrom, and the horiaontal mean eing directly connected with the sand delivery pipe for the discharge of the sand in the sanding action to the track. Arranged at the point of intersection of thevertical and horizontal branches of thesand channel is a blast nozzle 8, through which a blast of air is supplied to discharge the sand through the horizontal branch of the channel and into the delivery pipe. This nozzle may be and preferably is one ofthe forms disclosed in my prior patents or application referred to, but may be of any other suitable construction. Extending-longitudinally within the vertical branch 2 of the sand channel and throughout the length of the sand. supplypipe 4: is a blast or cleanouttube 9, closed at its upper end and provided at points throughout its length with perforations or jet apertures 10 through which jets of compressed air are injected into the supply pipe and vertical'branch of the channel for the purpose of producing a blast to prevent the clogging or undue accumulation of sand within such conductors. Theseperforations or jet apertures 1Q may be disposed spirally about the tube and inclined at an outward and forward angle in the direction of the line of feed of the sand, for the purpose of producing a whirling blast, as set forth in my prior patents and application. Extending longitudinally from the delivery end of the horizontal portion ofthe feed channel into the sand delivery pipe 6 is an auxiliary blast or clean-out pipe 11, for injecting a blast of compressed air into said delivery pipe to prevent the clogging or undue accumulation therein of the sand supplied thereto for the sanding action.

In accordance with my invention, the upper wall of the horizontal branch 3 of the sand trap is provided with a longitudinally extending compressed air feed duct 12 extending at itSI'ear end into the lower portion of the horizontal branch 2 of said trap and terminating at its forward end just in rear of the forward end of the horizontal branch 3, the said respective ends of the duct being internally threaded to receive the lower threaded end of the tube or pipe 9 and the rear threaded end of the tube or pipe 11, respectively. At a point in its length the upper wall ofthe horizontal branch 3 .is formed with an apertured boss 15 communicating with the duct 12 and intern-ally threaded toreceive the delivery end of an air supply pipe 16, said pipe being providedto supply air to the clearance or blastpipes 9 and 11, while a supplypipe .17 is provided for delivering air to .the'blast nozzle 8. The duct 15 constitutes a means whereby air-may flow from:the pipe 16 to both tubes :9 and 11 so that the blast conduit connections to the tubes .lie wholly within the body of the trap and obviate the use of pipes-and other exterior'connections liable to be damaged orto work'loose and leak, with obvious disadvantages.

It will be observed that the upper wall of the horizontal branch 3 is .materiallythickened for the formation of the duct 15, and thus, in addition to strengthening the trap, forms a thickened surface to sustain the wear from the sand blast during the sanding action, thusprolonging the life of the trap. Furthermore, as the duct is arranged wholly above the line oftravelof the sand blast, it will be seen that the tube 9 may be disposed to lie wholly at its lower end within the vertical branch .2 of the trap and the tube 11 to lie longitudinally within the upper portion of the deliverypipe. By this means the necessity of extending the tube 9 down intothe horizontal branch ofthe trap is obviated, thus avoiding the use of any surface other than the nozzle 8 at the angle and avoiding the accumulation of sand therein, while as the pipe '11 is disposed above the horizontal center of the horizontal 7 portion of the blast channel the said pipe may be made comparatlvely short and stra1ght,thus avo ding the necessity of making it of any considerable length and-curving to properly direct the blast therefrom into-the curved delivery pipe 6. As aresult, the number of surfaces within the blast channel about which the sand may accumulate is reduced to the minimum, with a consequent increase of efliciency.

Inpractice, the supply of air through the conducting pipes 16 and 17 may be .controlled by the engineer from the cab, said pipes being provided with suitable controlling valves 'forthat purpose, and it willbe seen that by the described construction and arrangement of the nozzle and feed duct the supply pipes may be conveniently arranged to extend parallel with each other and employed independently of one another. Also it will be seen that the feed duct provides for .anoverhead connection between the .same and the feed pipe 16, whenever such connection can be employed, with the result of doing away with angle pipes or fittings liable-to be injured orto interfere with the free flow of the air, while at the same time the nozzle may be coupled to the pipe 16 through an underhead fitting, thus avoiding complication in the connections of the pipes with or arrangement of said pipes about the sand trap.

Iclaim: 7 1. A sand traphaving a'horizontalpor t1on and a vertical portion, a duct extending longitudinally vof the trap in the upper wall of saidhorizontal portion and partially into said vertical portion, blast xelements connected with the opposite ends of said duct, and an air supply conductor leading into the duct between said blast devices.

2. A sand trap having a horizontal portion and a vertical portion, the upper wall of the horizontal portion being provided with a longitudinally extending duct, a blast pipe arranged within the vertical portion of the trap and communicating at its lower end with said duct, a blast device projecting horizontally beyond the delivery end of the horizontal portion of the trap and communicating at its inner end with said duct and an air supply conductor cominunicating with said duct between said blast devices.

3. A sand trap having a horizontal portion and a vertical portion, a blast nozzle projecting into said trap at the angle of intersection of said portions, the upper wall of the horizontal portion being provided with a longitudinally extending duct projecting into said vertical portion above the plane of said nozzle, a blast device disposed within the vertical portion and communicating at its'lower end with the adjacent end of said duct, a second blast device communicating with the opposite end of the duct and projecting horizontally beyond the delivery end of the horizontal portion of the trap, and an air supply conductor communicating with the duct at a point between said blast devices.

4. A sand trap having a horizontal portion and a vertical portion, said trap having the upper wall of its horizontal portion formed with a longitudinally extending duct, projecting at its rear end upwardly into the vertical portion, a blast nozzle projecting into said trap at the angle of intersection of said portions, a blast pipe extending at its lower end into the vertical portion of the trap and communicating with the adjacent end of the duct, a blast pipe projecting horizontally beyond the delivery end of the horizontal portion of the trap and communicating with the adjacent end of the duct, and an air supply conductor communicating with the duct between said blast pipes.

5. A sand trap having a horizontal portion and a vertical portion, the upper wall of said trap being provided with a longitudinally extending duct projecting at its rear end upwardly into the vertical portion of the trap, an air supply conductor communicating from above with the horizontal portion of said duct, a blast nozzle projecting into said trap at the angle of intersection of said portions and substantially in parallel relation to the bore of the horizontal portion, a blast pipe extending downwardly into the vertical portion of the trap and connected at its lower end at a point materially above the blast nozzle with the adjacent end of the duct, and a blast pipe extending longitudinally at the delivery end of the horizontal portion of the trap in parallel relation to and above the line of the axis of the blast nozzle and communicating with the adjacent end of the duct.

In testimony whereof I ailix my signature.

WILLIAM H. WHITE.

Copies of this patent may be obtained for five cents each, by addressing the Washington, D.

"Commissioner of Patents, 

